Obesity 'raises cancer risk' new study finds

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Overweight or obese people are at greater risk of developing cancer, according to a major new study by the London School of Hygiene and Tropical Medicine.

Researchers from the school gathered data on 5.2 million people in the UK, of which nearly 170,000 developed cancer, and found that a person's Body Mass Index, a measure of body fat, was linked to 17 out of 22 cancers.